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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
That's just a scale/unit conversion - the number of arcseconds in a degree (3600) divided by the number of microns in a mm (1000).
That's just a scale/unit conversion - the number of arcseconds in a degree (3600) divided by the number of microns in a mm (1000).
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By
Leigh Caldwell
· #9240
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
Hi Bassliner, Thanks for the info. And where does the 3.6 come from? Doug Doonan
Hi Bassliner, Thanks for the info. And where does the 3.6 come from? Doug Doonan
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By
Doug Doonan
· #9239
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Occasional erratic behaviour when slewing EXOS2
#EXOS2
Unpowered hubs are notorious for this kind of behavior. Good this time, not the next. Wes
Unpowered hubs are notorious for this kind of behavior. Good this time, not the next. Wes
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By
Wes Mcdonald
· #9235
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Occasional erratic behaviour when slewing EXOS2
#EXOS2
Thanks for the suggestion Wes - I think time and location are all aligned but I will check. And I'm sure you're right on the hub, Bob. I got this one because I wanted one less device to draw power if
Thanks for the suggestion Wes - I think time and location are all aligned but I will check. And I'm sure you're right on the hub, Bob. I got this one because I wanted one less device to draw power if
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By
Leigh Caldwell
· #9234
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Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do.
#G11
#astrophotography
#iEXOS-100
#EXOS2
Parag Yes, there are no limits built into the driver, unless you do a goto. The driver will slew you around correctly according to the need to do a meridian flip. But it will allow you to track throug
Parag Yes, there are no limits built into the driver, unless you do a goto. The driver will slew you around correctly according to the need to do a meridian flip. But it will allow you to track throug
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By
Wes Mcdonald
· #9233
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Occasional erratic behaviour when slewing EXOS2
#EXOS2
Leigh: Sounds like time or location or both are off for stellarium and ascom driver. Make sure stellarium location and time are same as the ASCOM driver location. Wes.
Leigh: Sounds like time or location or both are off for stellarium and ascom driver. Make sure stellarium location and time are same as the ASCOM driver location. Wes.
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By
Wes Mcdonald
· #9232
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
HI Jerry, This straightens me out on the formula and how it works. Pretty neat. Also, thanks for the chart. It will be handy in my set-up. Boy, all I can say is that this astronomy stuff is complicate
HI Jerry, This straightens me out on the formula and how it works. Pretty neat. Also, thanks for the chart. It will be handy in my set-up. Boy, all I can say is that this astronomy stuff is complicate
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By
Doug Doonan
· #9231
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Occasional erratic behaviour when slewing EXOS2
#EXOS2
Leigh, Whatever else is going on, you might want to pre-emptively switch that unpowered USB hub out for a powered one... Lots of tales of woe over on CloudyNights from folks who experienced various fo
Leigh, Whatever else is going on, you might want to pre-emptively switch that unpowered USB hub out for a powered one... Lots of tales of woe over on CloudyNights from folks who experienced various fo
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By
Robert Hoskin
· #9230
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Occasional erratic behaviour when slewing EXOS2
#EXOS2
Hi all Thanks for the always-interesting discussions in this forum! I am a relative beginner but starting to get the hang of the PMC-8 EXOS2 mount and my imaging setup. Occasionally, I will press the
Hi all Thanks for the always-interesting discussions in this forum! I am a relative beginner but starting to get the hang of the PMC-8 EXOS2 mount and my imaging setup. Occasionally, I will press the
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By
Leigh Caldwell
· #9229
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Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do.
#G11
#astrophotography
#iEXOS-100
#EXOS2
Wes, I don't use auto meridian flip feature of ATP and therefore should have continued tracking (in fact it executed my full 75 image plan as expected). When I platesolve the last 20 images, they are
Wes, I don't use auto meridian flip feature of ATP and therefore should have continued tracking (in fact it executed my full 75 image plan as expected). When I platesolve the last 20 images, they are
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By
Parag Modi
· #9228
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Slew Speed while using Stellarium (Serial)
#ASCOM
#EXOS2
I see. WEll perhaps Jerry would consider having a "quiet" mode slew. But honestly, the sound is low enough that in my experience, the sound is compatible with star parties. Slewing more quietly though
I see. WEll perhaps Jerry would consider having a "quiet" mode slew. But honestly, the sound is low enough that in my experience, the sound is compatible with star parties. Slewing more quietly though
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By
Wes Mcdonald
· #9227
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
There are 206265 arc-seconds per radian so the formula is the conversion between an angular value to a linear scale at the image plane. The value is 206.3 (rounded 206.265) because of the FL being in
There are 206265 arc-seconds per radian so the formula is the conversion between an angular value to a linear scale at the image plane. The value is 206.3 (rounded 206.265) because of the FL being in
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By
Jerry Hubbell - Explore Scientific VP Engineering
· #9226
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
Doug, here is a table that might help. Otherwise Peter Zelinka on You Tube explains the formula in his video choosing your first dedicated astronomy camera.
Doug, here is a table that might help. Otherwise Peter Zelinka on You Tube explains the formula in his video choosing your first dedicated astronomy camera.
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By
Harry
· #9225
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
Thank you all for your help, I will try switch guiding from my guide scope (162 mm) to my imaging scope (480) and see if guiding improves next time I have clear skies. That will give my a pixel scale
Thank you all for your help, I will try switch guiding from my guide scope (162 mm) to my imaging scope (480) and see if guiding improves next time I have clear skies. That will give my a pixel scale
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By
Walter Vinci
· #9224
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
Hey Doug, The formula is:pixel size (microns) x 206.3 /focal length in mm = image scale in arcsec/pixel 206.3 results out of:3.6 * (180 degrees / pi) = 3600/1000 * (180 degrees / pi) = 206.26 Doug Doo
Hey Doug, The formula is:pixel size (microns) x 206.3 /focal length in mm = image scale in arcsec/pixel 206.3 results out of:3.6 * (180 degrees / pi) = 3600/1000 * (180 degrees / pi) = 206.26 Doug Doo
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By
Andreas Volz
· #9223
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
Jerry, Where does the 206.3 in your formula come from, and what are its units? Doug
Jerry, Where does the 206.3 in your formula come from, and what are its units? Doug
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By
Doug Doonan
· #9222
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Slew Speed while using Stellarium (Serial)
#ASCOM
#EXOS2
Thanks for your reply Wes, When in my backyard, the slewing noise is fine, I am thinking about when I'm in a campground, with close neighbors, slowing the slew speed down would reduce the whiling nois
Thanks for your reply Wes, When in my backyard, the slewing noise is fine, I am thinking about when I'm in a campground, with close neighbors, slowing the slew speed down would reduce the whiling nois
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By
duker@...
· #9221
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Slew Speed while using Stellarium (Serial)
#ASCOM
#EXOS2
Rob The pmc8 manages its own slew speed. The ascom driver executed a specific command to the pmc8 which takes it from there. What is it about the programmed speed you feel the need to change? Wes
Rob The pmc8 manages its own slew speed. The ascom driver executed a specific command to the pmc8 which takes it from there. What is it about the programmed speed you feel the need to change? Wes
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By
Wes Mcdonald
· #9220
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Slew Speed while using Stellarium (Serial)
#ASCOM
#EXOS2
Good Afternoon, Using the PMC* connected via \serial, and slewing commands sent by Stellarium, I am trying to adjust the slewing speed a bit slower. Using the ASCOM Profiler, I simply cannot find the
Good Afternoon, Using the PMC* connected via \serial, and slewing commands sent by Stellarium, I am trying to adjust the slewing speed a bit slower. Using the ASCOM Profiler, I simply cannot find the
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By
duker@...
· #9219
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3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight
#EXOS2
#astrophotography
Hi Walter, Yes, I would suggest a 2x Barlow or tele-extender instead of a 3x. The formula for pixel or plate scale is: Pixel Scale = (Pixel Size x 206.3) / FL, So for your combination: Pixel Scale = (
Hi Walter, Yes, I would suggest a 2x Barlow or tele-extender instead of a 3x. The formula for pixel or plate scale is: Pixel Scale = (Pixel Size x 206.3) / FL, So for your combination: Pixel Scale = (
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By
Jerry Hubbell - Explore Scientific VP Engineering
· #9218
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